WIRING DIAGRAMS

NOTE

Polarity must be observed. If the HOT side of the second transformer is jumpered to the COMMON side of the first transformer a short will be made. Damage to equipment will occur when power is restored.

OBY2 Y1G

 

Reversing

 

 

Reversing

Valve

2nd Stage

Fan

 

E/W1

W2

Emergency

Heat

C *

L

R

SYSTEM

MONITOR

 

THERMOSTAT

 

SYSTEM

 

 

 

 

 

Limit or

 

Limit or

 

 

 

 

 

 

 

Safety

HOT

Safety

24 VAC

 

 

 

 

 

120 VAC

Switches

 

Switches

 

 

 

 

 

 

 

 

 

 

 

 

 

NEUTRAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valve

Energized in Compressor

 

Relay

Energized in

Heat, Off,

 

 

 

 

 

 

Cool Mode

Emergency

 

Compressor

 

 

Mode

 

 

 

 

 

 

Contactor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay

Aux

Heat

Relay

SWITCH

24 VAC

ACCESSORY RELAY N.O.

CONTACT

COMMON

Auxiliary

Heating

Transformer

(Class II

Current Limited)

NOTE

The accessory relay scheme is required when safety circuits exist in both systems.

TWO COMMONS MUST

BE JUMPERED TOGETHER!

COMMON

Limit or

Safety

Switches

24 VAC

120 VAC

Limit or

Safety Switches HOT

NEUTRAL

Heat Pump Transformer

(Class II Current Limited)

Figure 4. Typical wiring diagram for two transformer heat pump systems with safety circuits in BOTH systems

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” alkaline batteries.

Heat Pump Terminal Outputs

Refer to equipment manufacturers' instructions for specific system wiring information.

You can configure the thermostat for use with the following heat pump system types:

HEAT PUMP TYPE 1. Single stage compressor system; gas or electric backup.

This thermostat is designed to operate a single-transformer system. If you have a two-transformer system, cut and tape off

one transformer. If transformer safety circuits are in only one of the systems, remove the transformer of the system with NO safety circuits. If required, replace remaining transformer with a 75VA Class II transformer. After disconnecting one transformer, the two commons must be jumpered together.

Use the terminal output information below to help you wire the thermostat properly for your heat pump system. After wiring, see CONFIGURATION section for proper thermostat configu- ration.

 

 

 

 

THERMOSTAT TERMINALS (HEAT PUMP)

 

 

SYSTEM

L

C*

R

W2

E/W1

Y2

Y1

G

O

B

Heat

Fault

24 Volt

24 Volt

Heat Mode

Emergency

No

Heat and

Blower/Fan Energized

Energized

Energized

Pump 1

Indicator

(Common)

(Hot)

2nd stage,

Mode

Output

Cool mode

on call for Heat

in Cool

in Heat

 

or System

 

 

Emergency

1st stage

 

1st stage

and Cool

Mode

OFF

 

 

 

 

Heat

Malfunction

 

 

Mode 2nd

 

2nd

(compressor)

Set GAS/ELEC switch

 

Emergency

Pump 2

Switch

 

 

stage

 

stage

 

for Emergency mode

 

mode

 

 

 

 

Heat Mode

 

compressor

 

 

 

 

 

 

 

 

3rd stage,

 

 

 

 

 

 

 

 

 

 

Emergency

 

 

 

 

 

 

 

 

 

 

Mode 2nd

 

 

 

 

 

 

 

 

 

 

stage

 

 

 

 

 

 

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” alkaline batteries.

O

B

Y1

 

Y2

G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor

 

 

 

 

 

 

 

 

 

 

Contactor

 

Reversing

 

Reversing

 

 

 

 

 

 

 

 

 

 

Stage 2

 

Valve

 

Valve

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Energized in

 

Energized in

 

 

 

 

 

 

 

 

Cool Mode

 

Heat Mode

 

Compressor

 

 

Fan

 

 

 

Off Emergency

 

Contactor

 

 

 

 

 

 

 

 

Relay

 

 

 

 

 

 

Stage 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E/W1

Heat

Relay

Stage 1

W2

Heat

Relay

Stage 2

C *

 

THERMOSTAT

R

SYSTEM

 

 

 

 

 

 

 

 

 

 

 

 

Hot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 VAC

 

 

 

 

 

 

120 VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Neutral

 

 

 

 

 

 

 

 

 

TRANSFORMER

 

 

(Class II, Current Limited)

Figure 5. Typical wiring diagram for single transformer multi-stage systems

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” alkaline batteries.

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Emerson 1F83-277 installation instructions Wiring Diagrams, Heat Pump Terminal Outputs

1F83-277 specifications

The Emerson 1F83-277 is a sophisticated programmable thermostat designed to bring efficiency and comfort to residential heating and cooling systems. This device stands out with its user-friendly interface and advanced features, making it an ideal choice for homeowners looking to modernize their HVAC control.

One of the main features of the 1F83-277 is its intuitive touchscreen display. The vibrant, easy-to-read screen allows users to effortlessly navigate through menus and settings. This interface is critical for accessing various functionalities, including temperature settings, scheduling programs, and energy-saving modes.

The thermostat is equipped with a five-day programming capability, enabling users to establish distinct heating and cooling schedules for weekdays and weekends. This level of customization allows for optimal energy management, as homeowners can set the temperature to match their daily routines. By adjusting the temperature according to specific usage patterns, users can significantly reduce energy consumption and lower utility bills.

Another notable feature is the inclusion of Smart Response Technology, which learns the heating and cooling needs of the home and adjusts the operation of the HVAC system accordingly. This intelligent adaptation ensures that the desired temperature is reached at the right time, enhancing overall comfort while maximizing energy efficiency.

The Emerson 1F83-277 supports multiple heating and cooling stages, accommodating various HVAC systems, including conventional, heat pump, and multi-stage configurations. This versatility makes it suitable for a wide range of residential settings, ensuring compatibility with most existing systems.

Additionally, the thermostat features a user-friendly setup process, allowing for quick installation and easy connectivity. It is compatible with various systems, including conventional, heat pumps, and gas or electric heating, which means it can fit seamlessly into any home environment.

Another key characteristic is its energy-saving features, such as an Eco mode that helps to minimize energy usage when the home is unoccupied. This is further augmented by the ability to track energy usage, enabling users to monitor their consumption patterns and make informed adjustments.

Overall, the Emerson 1F83-277 blends advanced technology with user-centric design, providing an efficient and comfortable heating and cooling solution for today's discerning homeowners.